Core Dump Files

Dec 5, 2007

Files such as core.12762 keep appearing in the root web directory. Amount of core files appearing seems to be proportional to traffic. On average one core file per few million php requests.

Will appreciate advice on how to troubleshoot this issue, or how to disable the core dumping. As it is one error per few million requests it does not seem significant enough to spend several hours troubleshooting.

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Apache CentOS Crash - Core Dump Analysis And Backtrace

Nov 30, 2013

I've been seeing lots of the following error in my error_log recently, I've enabled core dumps and have managed to analyse one using gdb:

[Fri Nov 29 20:44:41.318847 2013] [core:notice] [pid 2307] AH00051: child pid 7504 exit signal Segmentation fault (11), possible coredump in /tmp/core-dump[Fri Nov 29 20:44:41.318937 2013] [core:notice] [pid 2307] AH00051: child pid 7623 exit signal Segmentation fault (11), possible coredump in /tmp/core-dump[Fri Nov 29 20:44:43.324859 2013] [core:notice] [pid 2307] AH00051: child pid 7724 exit signal Segmentation fault (11), possible coredump in /tmp/core-dump

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Plesk 12.x / Linux :: Unable To Rotate Dump - The Dump Rotation Is Failed With Code 121

Feb 4, 2015

I have enabled the backup rotation of some websites to my "Personal FTP Repository", the problem is that Plesk is unable to do it due this error:

Code:
Unable to rotate dump: The dump rotation is failed with code '121' at /usr/local/psa/admin/bin/plesk_agent_manager line 1041.

I read here [URL] .... that it should be solved but I have the version 12.0.18 Update #33, why does it persist?

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Core.xxxxx Files

Dec 16, 2007

I`ve found some core.xxxxx files in some directories under some of our accounts.

I think those should be a trojan, Is it right?

* Many of those files are 0bytes, But some others are about 2-3M.

And how to remove those? What should to do to have those removed successfully.

This is a part from one of those files:

Code:
^?ELF^A^A^A^@^@^@^@^@^@^@^@^@^D^@^C^@^A^@^@^@^@^@^@^
@4^@^@^@^@^@^@^@^@^@^@^@4^@ ^@U^@^@^@^@^@^@^@^D^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^A^@^@^@^@ ^@^@^@^P^Q^@^@^@^@^@^@^@^@^@^@@^M^@^E^@^@^@^@^P^@^@^A^@^@^@^@ ^@^@^@P^^^@^@^@$
q^Y^@^@^@^@^@�����x^^^@^@^@^@^@^@^@^@^@^@^@^@^@��^]^@^@^@^@^@����x^^^@^@^@^@^@^@^@^@^@^@^@^@^@�^]^@^A^@^@^@^P^@^@^@^@y^^^@^B^@^@^@^@^@^@^@$
^@^@^@^@^@^@^@(^@^@^@#^L^^^@^A^@^@^@^P^@^@^@`z^^^@^E^@^@^@^@^@^@^@^T^@^@^@^V�^]^@^A^@^@^@^P^@^@^@z^^^@^C^@^@^@|�^]^@^P^@^@^@+�^]^@^A^@^@^@^$
)^@^@^@^@^@^@^@^@^@^@^@^@^@^@^P^@^@^@^^@^^^@^E^@^@^@P(^@^@^@^@^@^@^@^@^@^@^@^@^@^@^P^@^@^@�^@^^^@^E^@^@^@^V=^
@^@^@^@^@^@^@^@^@^@^@^@^@^@^P^$
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^H^^^@^@^@^@^@^B
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@t^K^^^@^A^@^@^@^P
^@^@^@�|^^^@^C^@^@^@^@^@^@^@^L$
^@^@^@^�^X^@ ^�^X^@^@^@^@^@H^P^@^@��^X^@a�^X^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@!^@^@^@^H^@^@^@^X^@^@^@^H^@^@^@^A^@^@
^@�^�^X^@^D^�^X^$
^@^@^@^Z�^X^@p^X^@^@^@^@^@^^@^@^@��^X^@a�^X^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^
@^@^@^C^@^@^@^G^@^@^@^P^@^@^@^@^@^@^@^�^X^@��^X^@�^X^@^@$
^@^@^@�^@^@^K^@^@^@^P^@^@^@^C^@^@^@�^^^^@^B^@^@^@^^B^@^@^T^@^@^@^Q^@^@^@^W^@^@^@�^S^@^Q^@^@^@T^R^@^R^@^@^@^^@^@^S^@^@^@^H^@^@^@���o^$
�^S^@^Z�^S^@*�^S^@:�^S^@J�^S^@Z�^S^@j�^S^@z�^S^@^�^S^@^�
^S^@��^S^@��^S^@�^S^@�^S^@�^S^@��^S^@
�^S^@^Z�^S^@*�^S^@:�^S^@J�^S^@Z�^S^@j�^S^@z�^S^@^�^S^@^�
^S^@��^S^@��^S^@�^S^@�^S^@�^S^@��^S^@
�^S^@^Z�^S^@*�^S^@:�^S^@J�^S^@Z�^S^@j�^S^@z�^S^@^�^S^@^�
^S^@��^S^@��^S^@�^S^@�^S^@�^S^@��^S^@
�^S^@^Z�^S^@*�^S^@:�^S^@J�^S^@Z�^S^@j�^S^@z�^S^@^�^S^@^�
^S^@��^S^@��^S^@�^S^@�^S^@�^S^@��^S^@.

We are using cPanel on CentOS 4.5, And have clamav installed on the server.

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What Are These Files For ? Core.xxxxx

Jun 25, 2007

I ran ls -la / and I saw something new that I haven't seen before, look at this result :

-rw------- 1 root root 9375744 Jun 2 14:10 core.21044
-rw------- 1 root root 9375744 Jun 2 14:11 core.21056
-rw------- 1 root root 9379840 Jun 2 14:44 core.22839
-rw------- 1 root root 9379840 Jun 2 14:56 core.22973
-rw------- 1 root root 9371648 Jun 2 14:59 core.22997
-rw------- 1 root root 9371648 Jun 2 15:02 core.23182
-rw------- 1 root root 9506816 Jun 22 05:26 core.26811
-rw------- 1 root root 9367552 Jun 18 04:20 core.27185
-rw------- 1 root root 9371648 Jun 18 04:22 core.27245
-rw------- 1 root root 9371648 Jun 18 04:23 core.27289
-rw------- 1 root root 9367552 Jun 18 04:24 core.27306
-rw------- 1 root root 9297920 Jun 15 06:39 core.420
-rw------- 1 root root 9367552 Jun 18 04:28 core.7092

I did cat one of them and I saw there's something about kernel and the rest of the file has been filled by meaningless characters

They also filled up a huge space, what are these files for?

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May 20, 2007

Just noticed quite a few large Core. files within one of our websites (within a sub folder of public_html). Anyone knwo what these are and how they got there?

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Core Files Are Filing The Server

Mar 17, 2007

Now the core files for example (core.18920) files are filling the server, here is a shot

-rw------- 1 someuser somegroup 3.9M Mar 17 16:15 core.18920

all server account have that files, all users how running php files in there websites have the core.**** files and all websites quote are going to be excceded

I guess the problem from apache, i do rebuilf using whm, but the same problem

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Thousands Of Core.xxxx Files Fill The Hard Drive

Jun 16, 2008

I am having problem with a server. On all sites on the server start appearing core.xxxx files that in result fill server. Quotas were disabled because some people had issues logging in on because of error.

Quote:

Sorry for the inconvenience!

The filesystem mounted at /home/*** on this server is running out of disk space. cPanel operations have been temporarily suspended to prevent something bad from happening.

Please ask your system admin to remove any files not in use on that partition.

how to remove all of them so they dont appear again, on some sites there are thousands of core.xxxx files and weigh over 60GB.

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What Is This "core.xxxxx" Files

Jul 13, 2008

I found this files inside /home/user/public_html/forums

It's owner and group is nobody

When I try to cat and pico, all the weird thing came out

What is this files anyway? anybody can tell?

-rw------- 1 nobody nobody 25808896 Jul 9 00:06 core.9703
-rw------- 1 nobody nobody 25694208 Jul 11 11:56 core.9716
-rw------- 1 nobody nobody 25694208 Jul 11 11:56 core.9737
-rw------- 1 nobody nobody 25636864 Jul 10 01:34 core.975
-rw------- 1 nobody nobody 25870336 Jul 11 06:48 core.9758
-rw------- 1 nobody nobody 25694208 Jul 11 14:27 core.9763
-rw------- 1 nobody nobody 25632768 Jul 9 22:50 core.9786
-rw------- 1 nobody nobody 25944064 Jul 8 18:39 core.9799
-rw------- 1 nobody nobody 25870336 Jul 13 10:00 core.9802
-rw------- 1 nobody nobody 25632768 Jul 9 15:12 core.9806
-rw------- 1 nobody nobody 25694208 Jul 12 23:32 core.9809
-rw------- 1 nobody nobody 25870336 Jul 12 05:09 core.9815
-rw------- 1 nobody nobody 26005504 Jul 11 23:36 core.9816
-rw------- 1 nobody nobody 26005504 Jul 12 02:08 core.9826
-rw------- 1 nobody nobody 26005504 Jul 10 13:58 core.9833
-rw------- 1 nobody nobody 25632768 Jul 8 18:39 core.9854
-rw------- 1 nobody nobody 25632768 Jul 8 14:06 core.9865
-rw------- 1 nobody nobody 25694208 Jul 11 11:57 core.9881
-rw------- 1 nobody nobody 25870336 Jul 10 10:21 core.9901
-rw------- 1 nobody nobody 25694208 Jul 10 16:22 core.9903
-rw------- 1 nobody nobody 25694208 Jul 11 09:08 core.9913
-rw------- 1 nobody nobody 26005504 Jul 11 06:48 core.9922
-rw------- 1 nobody nobody 25632768 Jul 8 18:40 core.9927
-rw------- 1 nobody nobody 25870336 Jul 11 15:51 core.9942
-rw------- 1 nobody nobody 25694208 Jul 11 06:48 core.9946
-rw------- 1 nobody nobody 26005504 Jul 11 13:18 core.9983
-rw------- 1 nobody nobody 25944064 Jul 7 20:53 core.9989

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OR

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The thing that 1&1 has going for is it is the price. $4 a month is a darn good deal.

That's 2.5x cheaper than my current host. I could save a lot of money. I know, you get what you pay for...

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Code:
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